Like everyone here, I've been deejaying and producing since teenage days. Music is a question of taste, but you can expect some quality things here productionwise - normalized in frequency spectrum and loudness, ready for DJ use.
My tracks are uploaded as hi-fi variable bitrate MP3s. VBR is roughly equivalent to 256 bps. 320 is pointless, as a 44.1kHz/16bit file will mathematically never use more than 256. Funny how everyone on soundcloud seems to think 320 is good. In any case, MP3 will always mean a certain amount of loss, so the only way to avoid that is to use WAV/AIFF/FLAC or RAR. In professional productions you should never employ MP3, no matter how high the bitrate.
If you like Billy Idle's edits, get the newer ones from his own account at http://soundcloud.com/billyidle